Acetic Anhydride → HCID 15718840, compound

Participants

Reaction Steps

7.8 Parts of N-ethyl-2-[[1-(phenylmethyl)-4-piperidinyl]amino]-3H-imidazo[4,5-b]pyridin-3-ethanamine were taken up in 75 parts of trichloromethane. 1.51 Parts of acetic acid anhydride were added (exothermic reaction). The reaction mixture was stirred for 18 hours at room temperature. The whole was filtered over silica gel using a mixture of trichloromethane and methanol, saturated with ammonia (95:5 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was taken up in methylbenzene and the whole was evaporated again, yielding 8.5 parts (100%) of N-ethyl-N-[2-[2-[[1-(phenylmethyl)-4-piperidinyl]amino]-3H-imidazo[4,5-b]pyridin-3-yl]ethyl]acetamide as a residue (compound 176).

Provenance & Evidence